Hi, is this version still rock solid? I use it on win xp and got the program free through a gizmo promotion.This computer is not my main pc.

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Is 2.56 rock solid these days? I doubt, why?
Have look carefully at DefenseWall changelog - from April 20, 2010 (v3.00 version has been released) http://softsphere.com/news/
As you can see from v2.56 to current v3.16 there was a lot of improvements not only at security level but also in performance of this application.

Ilya is very busy developer - he tries to be always few steps ahead if we are talking about security terms.